Int 81 Fn 0400  - Gravis Ultrasound - Megaem - ???                         [s]

   AX = 0400h
   BX = ??? (segment)

Return: AX = ???
   BX = ???
Program: MegaEm is a protected-mode SoundBlaster, SoundCanvas, and MT-32
     emulator for the Gravis UltraSound

See Also: AX=0200h,AX=0202h,AX=0300h,INT 21/AX=FD12h/BX=3457h